CN112769097A - Locked-rotor protection system of direct current motor - Google Patents
Locked-rotor protection system of direct current motor Download PDFInfo
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- CN112769097A CN112769097A CN202011640549.9A CN202011640549A CN112769097A CN 112769097 A CN112769097 A CN 112769097A CN 202011640549 A CN202011640549 A CN 202011640549A CN 112769097 A CN112769097 A CN 112769097A
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- 238000004891 communication Methods 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0854—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
- H02H7/0844—Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error
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- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a DC motor locked-rotor protection system, which relates to the field of motor control and comprises the following components: at least one direct current motor; the motor driving device is connected with at least one direct current motor and used for detecting working current of the direct current motor in real time during operation, judging whether the direct current motor is abnormally locked and rotated according to the working current and further stopping the direct current motor from operating when the direct current motor is abnormally locked and rotated; and the control terminal is in signal connection with the motor driving device and is used for processing the working current for display, generating an operation instruction according to the operation of a user and sending the operation instruction to the motor driving device, and the motor driving device controls the running state of the direct current motor according to the operation instruction. The invention detects the working current generated when the direct current motor is locked, and controls the direct current motor to stop running when the detection result shows that the direct current motor is abnormally locked, thereby avoiding the damage to the direct current motor and a motor driving device caused by overlarge working current and effectively improving the use safety of the motor.
Description
Technical Field
The invention relates to the field of motor control, in particular to a direct current motor locked-rotor protection system.
Background
Because the direct current motor has good starting and speed regulating performance, the direct current motor is often applied to occasions with higher requirements on starting and speed regulating, such as large reversible rolling mills, mine windlasses, hotel high-speed elevators, gantry planers, electric locomotives, diesel locomotives, urban electric trains, subway trains, electric bicycles, papermaking and printing machinery, ship machinery, large precision machine tools, large cranes and other production machinery.
The motor stalling is a condition that the motor still outputs torque when the rotating speed is zero. The efficiency is zero when the motor is locked, the current in locked rotor can reach 7 times of rated current at most, even higher, and the motor can be burnt out after a little long time. When the motor drives a vehicle with special equipment, the motor which is retracted to the right position is blocked and generates instantaneous large current.
However, in the existing technical scheme, the motor stalling is generally processed by a limit switch and a visual observation mode, but the judgment precision of the motor stalling is not high enough in the mode, so that the direct current motor and other devices electrically connected with the direct current motor are easily damaged due to long-time large current caused by long-time blocking of the motor, danger is caused, and loss is caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a direct current motor locked-rotor protection system, which comprises:
at least one direct current motor;
the motor driving device is connected with at least one direct current motor and used for detecting working current of the direct current motor in real time during operation, judging whether the direct current motor is abnormally locked or not according to the working current and further stopping the direct current motor from operating when the direct current motor is abnormally locked;
and the control terminal is in signal connection with the motor driving device and is used for processing the working current for display, generating an operation instruction according to the operation of a user and sending the operation instruction to the motor driving device, and the motor driving device controls the running state of the direct current motor according to the operation instruction.
Preferably, the motor driving device includes:
an input port for connecting an external current;
the output port is used for outputting motor driving current to at least one direct current motor;
and the drive control module is respectively connected with the input port and the output port, is in signal connection with the control terminal, and is used for generating a motor drive current according to an operation instruction.
Preferably, the drive control module further includes:
the acquisition unit is in signal connection with the output port and is used for acquiring the working current of at least one direct current motor in real time;
the comparison unit is connected with the acquisition unit and is used for comparing the working current with a preset first current threshold and a preset second current threshold respectively, and the second current threshold is larger than the first current threshold;
the stopping unit is connected with the comparing unit and used for stopping outputting the working current when the working current is larger than the first current threshold;
and the early warning unit is connected with the comparison unit and used for generating an alarm instruction when the working current is greater than the second current threshold value.
Preferably, the motor driving device further comprises a first alarm module, which is in signal connection with the driving control module and is used for giving an alarm according to the alarm instruction.
Preferably, the motor driving device further includes a port protection module electrically connected to the input port and the output port, respectively, and configured to perform large current protection on the input port and the output port simultaneously.
Preferably, the motor driving device further comprises a communication module, and the driving control module is in signal connection with the control terminal through the communication module to receive the operation instruction sent by the control terminal and send the collected working current and/or the alarm instruction to the control terminal.
Preferably, the control terminal further includes:
the display module is used for displaying the working current;
and the second alarm module is used for alarming according to the alarm instruction.
Preferably, the device further comprises a power supply device electrically connected with the motor driving device for providing the external current.
Preferably, the motor driving device further comprises a housing, and the motor driving device is arranged in the housing.
Preferably, the housing is made of metal.
The technical scheme has the following advantages or beneficial effects:
according to the technical scheme, the working current generated when the direct current motor is locked up is detected, the direct current motor is controlled to stop running when the detection result shows that the direct current motor is abnormally locked up, the direct current motor and the motor driving device are prevented from being damaged due to overlarge working current, the direct current motor, the electric driving device and related devices are effectively protected, and the safety is improved.
Drawings
Fig. 1 is a schematic diagram illustrating an overall structure of a dc motor locked-rotor protection system according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving control module according to a preferred embodiment of the invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be included in the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems in the prior art, there is provided a dc motor locked-rotor protection system, as shown in fig. 1, including:
at least one direct current motor 2;
the motor driving device 1 is connected with at least one direct current motor 2 and is used for detecting the working current of the direct current motor 2 in real time during operation, judging whether the direct current motor 2 is abnormally locked and rotated according to the working current and further stopping the direct current motor 2 from operating when the direct current motor 2 is abnormally locked and rotated;
and the control terminal 3 is in signal connection with the motor driving device 1 and is used for processing the working current for display, generating an operation instruction according to the operation of a user and sending the operation instruction to the motor driving device 1, and the motor driving device 1 controls the running state of the direct current motor 2 according to the operation instruction.
Specifically, in the present embodiment, the motor drive device 1 may be a dc motor driver. Preferably, the dc motor driver is connected to four dc motors 2, and detects the operating current of the four dc motors 2 during operation in real time. The direct current motor driver analyzes the working current of the four direct current motors 2 respectively to obtain whether each direct current motor 2 is abnormally locked, when the direct current motor 2 is abnormally locked, the direct current motor 2 driver controls the corresponding direct current motor 2 to stop running, the direct current motor 2 and the direct current motor driver are prevented from being damaged due to overlarge working current of the direct current motor 2, the direct current motor 2 is effectively protected, the direct current motor driver and other connected related devices are realized, and the safety of the technical scheme is effectively improved.
Preferably, the dc motor driver can set various parameters of the motor during operation, wherein the parameters include: the motor stop delay, the motor extension speed, the motor extension torque and the like.
The control terminal 3 is provided with a man-machine interaction interface. The control terminal 3 analyzes the working current sent by the driver of the direct current motor 2 in real time and displays the working current in real time through the human-computer interaction interface, and when each direct current motor 2 is abnormally locked, the current working current is displayed on the human-computer interaction interface so as to realize real-time diagnosis.
Wherein, control terminal 3 can be the cell-phone, also can be other controlling means such as panel computer and industrial computer, can select for use according to actual conditions. The human-computer interaction interface is also provided with a plurality of functional buttons. The method comprises the following steps: a one-key telescoping button and a single telescoping button. The user can realize simultaneously that four direct current motor 2 that the simultaneous control is connected with the direct current motor driver are flexible simultaneously through pressing the flexible button of a key on human-computer interaction interface, also can realize the independent control to the direct current motor 2 that this single flexible button corresponds through pressing single flexible button for this technical scheme's integration degree is higher.
In a preferred embodiment, the solution is applied to a camping vehicle. Each direct current motor 2 is connected with the camping cabin. When the camping vehicle arrives at the destination, the camping vehicle needs to stretch out of the camping cabin to arrange beds and arrange tables, chairs and stools. The user realizes the stretching out and retracting of all the camping cabins by one key through pressing the one-key telescopic button on the human-computer interaction interface of the control terminal 3, is more convenient and faster, and improves the camping efficiency.
In a preferred embodiment of the present invention, the motor drive apparatus 1 includes:
an input port 11 for connecting an external current;
an output port 13 for outputting a motor driving current to the at least one dc motor 2;
and the driving control module 12 is respectively connected with the input port 11 and the output port 13, and is in signal connection with the control terminal 3, and is used for generating a motor driving current according to the operation instruction.
Specifically, in this embodiment, the motor driving device 1 receives an external current through the input port 11 and transmits the external current to the driving control module 12, and the driving control module 12 processes the external current according to an operation instruction sent by the control terminal 3, so as to generate a motor driving current, and outputs the motor driving current to the at least one dc motor 2 through the output port 13.
In a preferred embodiment of the present invention, as shown in fig. 2, the driving control module 12 includes:
the acquisition unit 121 is in signal connection with the output port 13 and is used for acquiring the working current of at least one direct current motor 2 in real time;
the comparing unit 122 is connected to the collecting unit 121, and is configured to compare the working current with a preset first current threshold and a preset second current threshold, where the second current threshold is greater than the first current threshold;
a stopping unit 124 connected to the comparing unit 122 for stopping outputting the working current when the working current is greater than the first current threshold;
the early warning unit 123 is connected to the comparing unit 122, and is configured to generate an alarm command when the working current is greater than the second current threshold.
Specifically, in this embodiment, the acquisition unit 121 acquires the working current of the dc motor 2 in real time, and the comparison unit 122 compares the working current with the first current threshold and the second current threshold respectively. When the working current is not greater than the first current threshold value, the current working current is not greater than the locked-rotor current when the motor is normally stretched in place, and at the moment, the direct current motors 2 are not controlled; when the working current is greater than the first current threshold, it indicates that the current working current is greater than the locked-rotor current when the normal extension is in place, and at this time, the stopping unit 124 stops outputting the working current, so as to avoid damage to the direct current motor 2 caused by excessive working current; when the working current is greater than the second current threshold, it indicates that the current working current is too large, and the user must be warned to avoid electric shock or fire, and the warning unit 123 generates a warning command. The drive control module 12 sends an alarm instruction to the control terminal 3. The control terminal 3 processes the alarm instruction and reminds a user of abnormal locked rotor of the direct current motor 2 on the man-machine interaction interface in a spring frame alarm mode.
In a preferred embodiment of the present invention, the motor driving apparatus 1 further includes a first alarm module 15, which is in signal connection with the driving control module 12 and is configured to alarm according to the alarm command.
Specifically, in this embodiment, the first alarm module 15 may be an audible and visual alarm, and when the audible and visual alarm receives the alarm instruction, the audible and visual alarm is performed to remind the user that the dc motor 2 is abnormally locked.
In the preferred embodiment of the present invention, the motor driving apparatus 1 further includes a port protection module 16 electrically connected to the input port 11 and the output port 13, respectively, for performing large current protection on the input port 11 and the output port 13 simultaneously.
Specifically, in this embodiment, the port protection module 16 may be a protection circuit, and by setting the port protection module 16, the large current protection of the input port 11 and the output port 13 is realized, so that the input port 11 and the output port 13 are prevented from being damaged when large current is directly input and output, and the safety of the technical scheme is ensured.
In a preferred embodiment of the present invention, the motor driving apparatus 1 further includes a communication module 17, and the driving control module 12 is connected to the control terminal 3 through the communication module 17 to receive the operation instruction sent by the control terminal 3 and send the collected working current and/or the alarm instruction to the control terminal 3.
Specifically, in this embodiment, the communication module 17 may adopt wired communication devices such as a CAN bus communication device and a 485 bus communication device, or may also adopt wireless communication devices such as a bluetooth communication device, a wireless lan communication device, a Zigbee communication device, and an NFC communication device, which CAN be flexibly selected according to the difficulty level of field wiring, thereby ensuring the flexibility of the technical scheme.
In a preferred embodiment of the present invention, the control terminal 3 further includes:
a display module 31 for displaying the working current;
and a second alarm module 32 for alarming according to the alarm command.
Specifically, in this embodiment, the display module 31 may be a display screen on the control terminal 3, and the display screen displays the working current; the second alarm module 32 can be an alarm program built in the control terminal 3, after the control terminal 3 receives an alarm instruction, the alarm program is started, at the moment, the display screen can warn the user of graphics and texts, so as to remind the user that the working current is too large, and meanwhile, an alarm sound is accompanied, so that the obvious warning effect is ensured.
In the preferred embodiment of the present invention, the present invention further comprises a power supply device 4 electrically connected to the motor driving device 1 for providing an external current.
In a preferred embodiment of the present invention, the present invention further includes a housing 1A, and the motor driving device 1 is disposed in the housing 1A.
Specifically, in this embodiment, realize the protection to motor drive device 1 through setting up shell 1A, avoid external environment to cause damage and interference to motor drive device 1, promoted this technical scheme's stability and security.
In the preferred embodiment of the present invention, the housing 1A is made of metal.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A DC motor locked rotor protection system is characterized by comprising:
at least one direct current motor;
the motor driving device is connected with at least one direct current motor and used for detecting working current of the direct current motor in real time during operation, judging whether the direct current motor is abnormally locked or not according to the working current and further stopping the direct current motor from operating when the direct current motor is abnormally locked;
and the control terminal is in signal connection with the motor driving device and is used for processing the working current for display, generating an operation instruction according to the operation of a user and sending the operation instruction to the motor driving device, and the motor driving device controls the running state of the direct current motor according to the operation instruction.
2. The dc motor stall protection system of claim 1, wherein the motor drive comprises:
an input port for connecting an external current;
the output port is used for outputting motor driving current to at least one direct current motor;
and the drive control module is respectively connected with the input port and the output port, is in signal connection with the control terminal, and is used for generating a motor drive current according to an operation instruction.
3. The dc motor stall protection system of claim 2, wherein the drive control module further comprises:
the acquisition unit is in signal connection with the output port and is used for acquiring the working current of at least one direct current motor in real time;
the comparison unit is connected with the acquisition unit and is used for comparing the working current with a preset first current threshold and a preset second current threshold respectively, and the second current threshold is larger than the first current threshold;
the stopping unit is connected with the comparing unit and used for stopping outputting the working current when the working current is larger than the first current threshold;
and the early warning unit is connected with the comparison unit and used for generating an alarm instruction when the working current is greater than the second current threshold value.
4. The system of claim 3, wherein the motor driving device further comprises a first alarm module in signal connection with the driving control module for alarming according to the alarm command.
5. The system according to claim 1, wherein the motor driving device further comprises a port protection module electrically connected to the input port and the output port, respectively, for performing high current protection on the input port and the output port simultaneously.
6. The direct current motor locked-rotor protection system according to claim 5, wherein the motor driving device further comprises a communication module, and the driving control module is in signal connection with the control terminal through the communication module to receive the operation command sent by the control terminal and send the collected working current and/or the alarm command to the control terminal.
7. The system of claim 6, wherein the control terminal further comprises:
the display module is used for displaying the working current;
and the second alarm module is used for alarming according to the alarm instruction.
8. The dc motor stall protection system of claim 2, further comprising a power supply electrically connected to the motor drive for providing the external current.
9. The dc motor stall protection system of claim 6, further comprising a housing, wherein the motor drive is disposed within the housing.
10. The dc motor stall protection system of claim 9, wherein the housing is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640549.9A CN112769097A (en) | 2020-12-31 | 2020-12-31 | Locked-rotor protection system of direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011640549.9A CN112769097A (en) | 2020-12-31 | 2020-12-31 | Locked-rotor protection system of direct current motor |
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| Publication Number | Publication Date |
|---|---|
| CN112769097A true CN112769097A (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011640549.9A Pending CN112769097A (en) | 2020-12-31 | 2020-12-31 | Locked-rotor protection system of direct current motor |
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| CN (1) | CN112769097A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459218A (en) * | 2022-09-20 | 2022-12-09 | 广东尚研电子科技股份有限公司 | Direct current motor driving device and locked rotor protection method thereof |
| CN118205483A (en) * | 2024-05-22 | 2024-06-18 | 潍坊埃锐制动系统有限公司 | Intelligent alarm indicating system of electric motor home walking device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077740A (en) * | 2007-06-26 | 2007-11-28 | 上海发电设备成套设计研究院 | Worm distributor operation control method |
| CN102633098A (en) * | 2012-04-12 | 2012-08-15 | 中联重科股份有限公司 | Control system, method and device of cold material conveying device and cold material conveying device |
| CN102916399A (en) * | 2012-10-17 | 2013-02-06 | 江苏安科瑞电器制造有限公司 | Motor protector applied to double-speed motor and implementing method of motor protector |
| CN103746626A (en) * | 2013-11-20 | 2014-04-23 | 广东威灵电机制造有限公司 | Locked rotor detection method and apparatus of motor control, and motor driver |
| CN206387887U (en) * | 2016-12-30 | 2017-08-08 | 无锡博慧斯生物医药科技有限公司 | A kind of motor rotation blockage automatic detection device |
| CN108768227A (en) * | 2018-06-27 | 2018-11-06 | 深圳市歌尔泰克科技有限公司 | Automatic coffee machine and its circuit for controlling motor |
| CN108923384A (en) * | 2018-06-07 | 2018-11-30 | 河南森源电气股份有限公司 | A kind of electric machine control system of three-station |
| CN109318787A (en) * | 2018-10-11 | 2019-02-12 | 河南垚栖杰科技有限公司 | A kind of multi-direction expanded type multi-functional deformation vehicle |
| CN109787191A (en) * | 2019-02-28 | 2019-05-21 | 哈尔滨理工大学 | A kind of detection of asynchronous motor supplied with variable frequency and protection system and method |
| CN210923907U (en) * | 2019-10-12 | 2020-07-03 | 山东泰开智能配电有限公司 | High-voltage switch quick mechanism running-in experiment intelligent control system |
| CN111953267A (en) * | 2020-08-02 | 2020-11-17 | 珠海市一微半导体有限公司 | Locked rotor judging method and rotating speed control method of motor |
-
2020
- 2020-12-31 CN CN202011640549.9A patent/CN112769097A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077740A (en) * | 2007-06-26 | 2007-11-28 | 上海发电设备成套设计研究院 | Worm distributor operation control method |
| CN102633098A (en) * | 2012-04-12 | 2012-08-15 | 中联重科股份有限公司 | Control system, method and device of cold material conveying device and cold material conveying device |
| CN102916399A (en) * | 2012-10-17 | 2013-02-06 | 江苏安科瑞电器制造有限公司 | Motor protector applied to double-speed motor and implementing method of motor protector |
| CN103746626A (en) * | 2013-11-20 | 2014-04-23 | 广东威灵电机制造有限公司 | Locked rotor detection method and apparatus of motor control, and motor driver |
| CN206387887U (en) * | 2016-12-30 | 2017-08-08 | 无锡博慧斯生物医药科技有限公司 | A kind of motor rotation blockage automatic detection device |
| CN108923384A (en) * | 2018-06-07 | 2018-11-30 | 河南森源电气股份有限公司 | A kind of electric machine control system of three-station |
| CN108768227A (en) * | 2018-06-27 | 2018-11-06 | 深圳市歌尔泰克科技有限公司 | Automatic coffee machine and its circuit for controlling motor |
| CN109318787A (en) * | 2018-10-11 | 2019-02-12 | 河南垚栖杰科技有限公司 | A kind of multi-direction expanded type multi-functional deformation vehicle |
| CN109787191A (en) * | 2019-02-28 | 2019-05-21 | 哈尔滨理工大学 | A kind of detection of asynchronous motor supplied with variable frequency and protection system and method |
| CN210923907U (en) * | 2019-10-12 | 2020-07-03 | 山东泰开智能配电有限公司 | High-voltage switch quick mechanism running-in experiment intelligent control system |
| CN111953267A (en) * | 2020-08-02 | 2020-11-17 | 珠海市一微半导体有限公司 | Locked rotor judging method and rotating speed control method of motor |
Non-Patent Citations (1)
| Title |
|---|
| 吴红星, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115459218A (en) * | 2022-09-20 | 2022-12-09 | 广东尚研电子科技股份有限公司 | Direct current motor driving device and locked rotor protection method thereof |
| CN118205483A (en) * | 2024-05-22 | 2024-06-18 | 潍坊埃锐制动系统有限公司 | Intelligent alarm indicating system of electric motor home walking device |
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Application publication date: 20210507 |